Input could be usb keyboard, otherwise the lvgl terminal app with its lvgl keyboard works. Output only mode for this I think.
> On 17 Feb 2025, at 21:25, Tomek CEDRO <to...@cedro.info> wrote: > > Yes that would be a nice feature also for testing the LCD and should > be easy to implement for output only mode when no input is required > :-) Input would require serial port like transport, keyboard, or > on-screen keyboard that makes things a bit more complicated :-) > Tomek > >> On Mon, Feb 17, 2025 at 8:11 PM Tim Hardisty <timhardist...@gmail.com> wrote: >> >> Just thinking out loud... >> >> Would NuttX benefit from a FrameBuffer stdout driver (e.g. /dev/fbcon) >> that allowed a pipe/dup to replace stdout, or the use of >> CONFIG_NSH_ALTSTDOUT and/or CONFIG_ALTSTDERR for console output? >> >> In my case, this is just for MCUboot messages in the case of bootloader >> issues; to let the user know what's going on and, perhaps, guide the >> user through recovery procedures. The LCD is the only display available, >> as a serial console is not available to the user for this embedded >> device. But could be a generally useful thing? >> >>> On 16/02/2025 10:45, Alan C. Assis wrote: >>> Hi Tim, >>> >>> I think there is not a framebuffer text in place for NuttX, but you can use >>> the code to handle text fonts from nx graphics to render the text directly >>> in the framebuffer. >>> >>> For Linux some years ago I used fbtext >>> https://sourceforge.net/projects/fbtext/ to print a message from initrd to >>> let user know a secret key the decript the disk. >>> >>> Alternatively if you want to print images in the screen you can use >>> something like fbprint ( https://github.com/Weinsen/fbprint ). >>> >>> BR, >>> >>> Alan >>> >>> On Saturday, February 15, 2025, Tim Hardisty <timhardist...@gmail.com> >>> wrote: >>> >>>> What is efficient solution to just do text though? >>>> >>>>> On 15 Feb 2025, at 13:42, Alan C. Assis <acas...@gmail.com> wrote: >>>>> >>>>> Hi Tim, >>>>> >>>>> You can create a NuttX application with LVGL and display your message or >>>>> image. >>>>> >>>>> Actually you don't need to use a graphic library if you just want to >>>> write >>>>> in the framebuffer, you can convert image to display directly in the >>>>> /dev/fb0 >>>>> >>>>> BR, >>>>> >>>>> Alan >>>>> >>>>>> On Sat, Feb 15, 2025 at 7:45 AM Tim Hardisty <timhardist...@gmail.com> >>>>>> wrote: >>>>>> >>>>>> Hello NuttX Colleagues! >>>>>> >>>>>> During MCUboot I want to display text messages on the framebuffer LCD >>>>>> driver (/dev/fb). This could either be via a FB console (useful for >>>>>> other reasons) or a FB terminal, or something else. >>>>>> >>>>>> I also quite like the idea of my main graphics app - LVGL based - having >>>>>> a console option (for syslog messages, perhaps), so perhaps LVGL is an >>>>>> option, but I'm wanting to keep the size down of course. >>>>>> >>>>>> Which of the NuttX armoury of features might be a good choice for this? >>>>>> >>>>>> Thanks! >>>>>> >>>>>> TimJTi >>>>>> >>>>>> > > > > -- > CeDeROM, SQ7MHZ, http://www.tomek.cedro.info
